Spending on security software across Europe will top 2.4 billion euros this year, with antivirus continuing to form the largest slice of the pie.

Antivirus will account for more than 50 percent of the total security software revenue market in 2007 according to the calculations by analyst Gartner.

Organisations are getting more sophisticated in the way they choose security products and technical evaluations are now common practice, the analyst said. Customers also want to deal with a smaller number of vendors which can supply products that work well together.

Gartner principal research analyst Ruggero Contu said traditionally the security software market has been dominated by 'best-of-needs' vendors but the market is now starting to see a gradual consolidation around fewer players.

But Contu added that security is becoming more complex and difficult for a single vendor to handle. "Customers require products that integrate with their security architecture rather than disconnected point solutions," he said in a statement.